oa African Entomology - Nigrobaetis Novikova & Kluge (Ephemeroptera: Baetidae): first record and new species from southern Africa, with reassignment of one northern African species
Nigrobaetis bethuneae sp. n. (Ephemeroptera: Baetidae) is descriptionbed from larvae collected from the Cunene (Kunene) River between Angola and Namibia. The new species represents the first record of Nigrobaetis Novikova & Kluge from southern Africa and a considerable extension of the distribution range for the genus. Nigrobaetis bethuneae is characterized by the presence of a small interantennal carina, arrangement of dorsal setae on the labrum, mandibular denticulation and setation, apicolaterally bluntly pointed labial palp segment 3, absence of hind-wing pads, presence of the first pair of gills, and general abdominal coloration. Ecological data on the new species are provided. The Algerian species Baetis rhithralis Soldan, previously considered to belong in Diphetor Waltz & McCafferty, is transferred to Nigrobaetis, and the biogeographic implications of the new assignment are discussed. ?
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